Question

在“mple.js”档案中,我有一张 j印功能。情况如下:

varmapDict ={100 : test_100.js , 200 : test_200_API.js , 300 : test_300_API.js }

function mapAPI()
{
    this.version = 0.1;
}

mapAPI.prototype.getFileName = function( id ) {
   return mapDict[id]
}

module.exports = mapAPI;

在另一个名为“机构......js”的档案中,我想动态地要求上述“测试——xxx_API”档案。我有以下法典:

const mapAPI  = require( ../../sample.js );
const map     = new mapAPI();
const mapFile = map.getFileName("100");
var insAPI    = require(mapFile);

当我由“Nodeinstitut.js”指挥实施该守则时,我发现以下错误:

Error: Cannot find module  ./test_100_API.js .

But the "test_100_API.js" file exists and is located in the current folder besides "institute.js". When I changed var insAPI = require(mapFile); to var insAPI = require("./test_100_API.js"); and give it the exact path instead of dynamic path, it works fine. Can anyone help me?

提前

Answer 1

你再次碰到的问题,因为Node.js要求根据目前的工作名录(在你管理着 no)而不是包含所需说明的档案,对单元采取相对途径。

In your case, mapFile contains just the filename ( test_100_API.js ), but Node.js is trying to find it in the current directory where you are running node institute.js. To fix this and allow for dynamic requires based on filenames stored in mapDict, you can modify your institute.js code as follows:

const path = require( path );
const mapAPI = require( ../../sample.js );

const map = new mapAPI();
const mapFile = map.getFileName("100");

// Construct the full path to the module using path.join
const modulePath = path.join(__dirname, mapFile);

// Now require the module using the constructed path
const insAPI = require(modulePath);

// Now you can use insAPI as needed

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